DTC P0724: Brake Switch "B" Circuit High: Procedure
WARNING: This page is about a different variant/trim than selected.
- READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Data List / Stop Light Switch.
- Read the values displayed on the Techstream.
Result
Item Measurement Item: Range (display) Normal Condition Stop Light Switch Stop light switch status:
ON or OFF- ON: Brake pedal is depressed
- OFF: Brake pedal is released
NG → See step 2
OK → See step 4
- INSPECT STOP LIGHT SWITCH See step 2
NG → See step 5
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - ECM)
- Disconnect the ECM connector.
- Turn the ignition switch to ON.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition A37-35 (ST1-) - Body ground Brake pedal released 11 to 14 V Brake pedal depressed 0 to 3 V A37-36 (STP) - Body ground Brake pedal released 0 to 3 V Brake pedal depressed 11 to 14 V - Reconnect the ECM connector.
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH - ECM)
OK → See step 6
- CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS
- REPLACE STOP LIGHT SWITCH. Refer to REMOVAL
- REPLACE ECM. Refer to REMOVAL